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Spitzer Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M Dwarf

MPS-Authors

Jung,  Youn Kil
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gould,  Andrew
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Udalski,  Andrzej
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sumi,  Takahiro
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yee,  Jennifer C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Shvartzvald,  Yossi
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zang,  Weicheng
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Han,  Cheongho
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Albrow,  Michael D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Chung,  Sun-Ju
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hwang,  Kyu-Ha
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ryu,  Yoon-Hyun
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Shin,  In-Gu
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zhu,  Wei
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cha,  Sang-Mok
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kim,  Dong-Jin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kim,  Hyoun-Woo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kim,  Seung-Lee
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Chung-Uk
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Dong-Joo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Yongseok
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Park,  Byeong-Gon
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pogge,  Richard W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mróz,  Przemek
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Szymański,  Michał K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Skowron,  Jan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Poleski,  Radek
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Soszyński,  Igor
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pietrukowicz,  Paweł
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kozłowski,  Szymon
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ulaczyk,  Krzystof
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rybicki,  Krzysztof A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Iwanek,  Patryk
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wrona,  Marcin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Beichman,  Charles A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bryden,  Geoffery
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Calchi Novati,  Sebastiano
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Carey,  Sean
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gaudi,  B. Scott
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henderson,  Calen B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Abe,  Fumio
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Barry,  Richard
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bennett,  David P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bond,  Ian A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bhattacharya,  Aparna
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Donachie,  Martin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fukui,  Akihiko
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hirao,  Yuki
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Itow,  Yoshitaka
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kondo,  Iona
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Koshimoto,  Naoki
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Li,  Man Cheung Alex
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Matsubara,  Yutaka
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Miyazaki,  Shota
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Muraki,  Yasushi
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Nagakane,  Masayuki
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ranc,  Clément
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rattenbury,  Nicholas J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Suematsu,  Haruno
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sullivan,  Denis J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Suzuki,  Daisuke
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tristram,  Paul J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yonehara,  Atsunori
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jacklin,  Savannah
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Penny,  Matthew T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Stassun,  Keivan G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fouqué,  Pascal
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mao,  Shude
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wang,  Tianshu
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019AJ....158...28J
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Citation

Jung, Y. K., Gould, A., Udalski, A., Sumi, T., Yee, J. C., Shvartzvald, Y., et al. (2019). Spitzer Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M Dwarf. The Astronomical Journal, 158.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D353-F
Abstract
We report the discovery of a Spitzer microlensing planet OGLE-2018-BLG- 0596Lb, with preferred planet-host mass ratio q ∼ 2 10−4. The planetary signal, which is characterized by a short (∼1 day) “bump” on the rising side of the lensing light curve, was densely covered by ground-based surveys. We find that the signal can be explained by a bright source that fully envelops the planetary caustic, i.e., a “Hollywood” geometry. Combined with the source proper motion measured from Gaia, the Spitzer satellite parallax measurement makes it possible to precisely constrain the lens physical parameters. The preferred solution, in which the planet perturbs the minor image due to lensing by the host, yields a Uranus-mass planet with a mass of M p = 13.9 ± 1.6 M ⊕ orbiting a mid M-dwarf with a mass of M h = 0.23 ± 0.03 M ☉. There is also a second possible solution that is substantially disfavored but cannot be ruled out, for which the planet perturbs the major image. The latter solution yields M p = 1.2 ± 0.2 M ⊕ and M h = 0.15 ± 0.02 M ☉. By combining the microlensing and Gaia data together with a Galactic model, we find in either case that the lens lies on the near side of the Galactic bulge at a distance D L ∼ 6 ± 1 kpc. Future adaptive optics observations may decisively resolve the major image/minor image degeneracy.